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Structural Engineering and Mechanics Volume 26, Number 4, July10 2007 , pages 427-439 DOI: https://doi.org/10.12989/sem.2007.26.4.427 |
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Repair of precracked RC rectangular shear beams using CFRP strip technique |
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J. Jayaprakash, Abdul Aziz Abdul Samad, Ashrabov Anvar Abbasovich and Abang Abdullah Abang Ali
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| Abstract | ||
| The exploitation of fibre reinforced polymer composites, as external reinforcement is an evergreen and well-known technique for improving the structural performance of reinforced concrete structures. The demand to use FRP composites in the civil engineering industry is mainly due to its high strength, light weight, and stiffness. This paper exemplifies the shear strength of partially precracked reinforced concrete rectangular beams repaired with externally bonded Bi-Directional Carbon Fibre Reinforced Polymer (CFRP) Fabrics strips. All specimens were cast in the laboratory environment without any internal shear reinforcement. The test parameters were longitudinal tensile reinforcement, shear span to effective depth ratio, spacing of CFRP strips, and orientation of CFRP reinforcement. It mainly focuses on the shear capacity and modes of failure of the CFRP strengthened shear beams. Results have shown that the CFRP repaired beams attained a shear enhancement of 32% and 107.64% greater than the control beams. This study underscores that the CFRP strip technique significantly enhanced the shear capacity of precracked reinforced concrete rectangular beams without any internal shear reinforcement. | ||
| Key Words | ||
| shear; CFRP; repair. | ||
| Address | ||
| J. Jayaprakash: Dept. of Civil Engineering, Universiti Putra Malaysia, Malaysia Abdul Aziz Abdul Samad: Universiti Tun Hussein Onn Malaysia, Malaysia Ashrabov Anvar Abbasovich: Tashkent Automobile and Road Construction Institute, Tashkent, Uzbekistan Abang Abdullah Abang Ali: Housing Research Centre, Universiti Putra Malaysia, Malaysia | ||